The megalopolises are regions of large population agglomeration, formed by the grouping of large metropolitan regions, which interconnect not physically, but by an efficient transportation and communication system.
It is, therefore, a regional territorial domain that usually concentrates investments, industrial activities and a good part of the population of a country.
Baixada Santista and the Campinas region, which together with the Paraíba Valley, form the first Brazilian megalopolis between São Paulo and Rio de Janeiro, group a group of thirteen satellite cities.
Rio-São Paulo Megalopolis (also called Brazilian Megalopolis and Southeast Brazilian Megalopolis)
This megalopolis in formation involves different Brazilian metropolitan centers (Rio de Janeiro, Sao Paulo, Campinas, Paraiba Valley, Sorocaba and Baixada Santista) located in southeastern Brazil; The Campinas and São Paulo metropolitan areas, however, are in a more advanced unification process and already form the first macrometropolis in the southern hemisphere - the Expanded Metropolitan Complex - which exceeds 32 million inhabitants (approximately 75% of the state's population). Paulo or 12% of the Brazilian population).
With an area of 82,616 square kilometers (0.97% of the Brazilian territory), consisting of 232 municipalities from three different states (Rio de Janeiro, São Paulo and Minas Gerais), the megalopolis includes the Metropolitan Regions (RMs) of Rio and São Paulo and extends from Campos dos Goytacazes, in the north of Fluminense, to Campinas, in the interior of São Paulo, passing by Juiz de Fora, in the Zona da Mata of Minas Gerais.
In this region, according to IBGE data, around 42 million people live, representing 23% of the total Brazilian population. Among the main urban centers that make up the megalopolis are, besides São Paulo and Rio de Janeiro, the cities of Campinas, Jundiaí, Piracicaba, Santos, Sao Jose dos Campos, Sorocaba, Duque de Caxias, Volta Redonda and Niteroi.